China: Beijing - Doubles - Main |
| 1/8-finals | Krajicek A./Ram R. | Koolhof W./Mektic N. | 1:2 (4:6, 6:3, 7:10) | dettagli | 28.09.2024 |
World: Davis Cup - World Group - Doubles - Main |
| | Bolelli S./Vavassori A. | Koolhof W./Van De Zandschulp B. | 0:2 (66:7, 5:7) | dettagli | 15.09.2024 |
| | Koolhof W./Van De Zandschulp B. | Matos R./Melo M. | 2:0 (6:4, 7:65) | dettagli | 12.09.2024 |
| | Koolhof W./Van De Zandschulp B. | Gille S./Vliegen J. | 1:2 (6:4, 65:7, 4:6) | dettagli | 10.09.2024 |
| | Haase R./Koolhof W. | Gille S./Vliegen J. | CAN. | dettagli | 10.09.2024 |
USA: US Open - Doubles - Main |
| Quarter-finals | Lammons N./Withrow J. | Koolhof W./Mektic N. | 2:1 (6:1, 65:7, 6:4) | dettagli | 03.09.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Heliovaara H./Patten H. | 2:0 (6:2, 6:2) | dettagli | 02.09.2024 |
| 1/16-finals | Koolhof W./Mektic N. | Matos R./Melo M. | 2:1 (6:3, 65:7, 6:3) | dettagli | 31.08.2024 |
| 1/32-finals | Koolhof W./Mektic N. | Griekspoor T./Kokkinakis T. | 2:0 (6:2, 7:64) | dettagli | 30.08.2024 |
USA: Winston-Salem - Doubles - Main |
| 1/8-finals | Escobar G./Nedovyesov A. | Koolhof W./Mektic N. | 2:1 (7:61, 64:7, 11:9) | dettagli | 20.08.2024 |
USA: Cincinnati - Doubles - Main |
| 1/8-finals | Heliovaara H./Patten H. | Koolhof W./Mektic N. | 2:1 (63:7, 7:62, 10:5) | dettagli | 16.08.2024 |
| 1/16-finals | Lehecka J./Ruud C. | Koolhof W./Mektic N. | CAN. | dettagli | 12.08.2024 |
| 1/16-finals | Doumbia S./Mannarino A. | Koolhof W./Mektic N. | 0:2 (4:6, 2:6) | dettagli | 12.08.2024 |
World: Olympic Games - Mixed Doubles - Main |
| 3rd place | Auger-Aliassime F./Dabrowski G. | Koolhof W./Schuurs D. | 2:0 (6:3, 7:62) | dettagli | 02.08.2024 |
| Semi-finals | Koolhof W./Schuurs D. | Zhang Z./Wang Xin. | 1:2 (6:2, 4:6, 4:10) | dettagli | 01.08.2024 |
| Quarter-finals | Vavassori A./Errani S. | Koolhof W./Schuurs D. | 1:2 (7:64, 3:6, 9:11) | dettagli | 31.07.2024 |
World: Olympic Games - Doubles - Main |
| 1/8-finals | Alcaraz C./Nadal R. | Griekspoor T./Koolhof W. | 2:1 (6:4, 62:7, 10:2) | dettagli | 30.07.2024 |
World: Olympic Games - Mixed Doubles - Main |
| 1/8-finals | Koolhof W./Schuurs D. | Tsitsipas S./Sakkari M. | 2:0 (6:4, 7:63) | dettagli | 29.07.2024 |
World: Olympic Games - Doubles - Main |
| 1/16-finals | Griekspoor T./Koolhof W. | Fucsovics M./Marozsan F. | 2:0 (6:2, 6:3) | dettagli | 28.07.2024 |
United Kingdom: Wimbledon - Doubles - Main |
| 1/16-finals | Broom C./Fery A. | Koolhof W./Mektic N. | 2:0 (7:64, 7:65) | dettagli | 07.07.2024 |
| 1/32-finals | Coria F./Navone M. | Koolhof W./Mektic N. | 0:2 (2:6, 1:6) | dettagli | 04.07.2024 |
United Kingdom: London - Doubles - Main |
| Quarter-finals | Arevalo M./Pavic M. | Koolhof W./Mektic N. | 2:0 (6:4, 7:5) | dettagli | 21.06.2024 |
| 1/8-finals | Baez S./Mannarino A. | Koolhof W./Mektic N. | 1:2 (6:4, 3:6, 3:10) | dettagli | 19.06.2024 |
Netherlands: Hertogenbosch - Doubles - Main |
| Final | Koolhof W./Mektic N. | Lammons N./Withrow J. | 0:2 (65:7, 63:7) | dettagli | 15.06.2024 |
| Semi-finals | Koolhof W./Mektic N. | Purcell M./Thompson J. | WO. | dettagli | 14.06.2024 |
| Quarter-finals | Koolhof W./Mektic N. | Barrientos N./Cabral F. | 2:1 (5:7, 6:2, 10:5) | dettagli | 13.06.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Arneodo R./Weissborn S. | 2:0 (7:68, 6:2) | dettagli | 12.06.2024 |
France: French Open - Doubles - Main |
| 1/16-finals | Koolhof W./Mektic N. | Purcell M./Thompson J. | 1:2 (6:4, 4:6, 4:6) | dettagli | 02.06.2024 |
France: French Open - Mixed Doubles - Main |
| 1/16-finals | Eikeri U./Gonzalez M. | Schuurs D./Koolhof W. | CAN. | dettagli | 01.06.2024 |
France: French Open - Doubles - Main |
| 1/32-finals | Koolhof W./Mektic N. | Arends S./Middelkoop M. | 2:1 (6:4, 63:7, 7:5) | dettagli | 31.05.2024 |
Italy: Rome - Doubles - Main |
| Quarter-finals | Koolhof W./Mektic N. | Bolelli S./Vavassori A. | 0:2 (4:6, 2:6) | dettagli | 16.05.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Baez S./Seyboth Wild T. | 2:0 (6:4, 6:2) | dettagli | 12.05.2024 |
| 1/16-finals | Koolhof W./Mektic N. | Haase R./Tsitsipas S. | 2:1 (5:7, 6:2, 11:9) | dettagli | 10.05.2024 |
Spain: Madrid - Doubles - Main |
| 1/16-finals | Griekspoor T./Koolhof W. | Granollers M./Zeballos H. | 0:2 (3:6, 66:7) | dettagli | 30.04.2024 |
Spain: Barcelona - Doubles - Main |
| Quarter-finals | Gonzalez M./Molteni A. | Koolhof W./Mektic N. | 2:0 (6:3, 7:61) | dettagli | 18.04.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Ram R./Salisbury J. | 2:0 (7:5, 6:4) | dettagli | 17.04.2024 |
Monaco: Monte Carlo - Doubles - Main |
| 1/8-finals | Fritz T./Rune H. | Koolhof W./Mektic N. | 2:1 (4:6, 6:3, 12:10) | dettagli | 09.04.2024 |
| 1/16-finals | Nys H./Zielinski J. | Koolhof W./Mektic N. | 1:2 (5:7, 7:5, 7:10) | dettagli | 08.04.2024 |
USA: Miami - Doubles - Main |
| 1/8-finals | Smith J. P./Verbeek S. | Koolhof W./Mektic N. | 2:0 (6:3, 6:3) | dettagli | 25.03.2024 |
| 1/16-finals | Erler A./Miedler L. | Koolhof W./Mektic N. | 0:2 (2:6, 2:6) | dettagli | 24.03.2024 |
USA: Indian Wells - Doubles - Main |
| Final | Granollers M./Zeballos H. | Koolhof W./Mektic N. | 0:2 (62:7, 64:7) | dettagli | 15.03.2024 |
| Semi-finals | Krawietz K./Puetz T. | Koolhof W./Mektic N. | 0:2 (2:6, 1:6) | dettagli | 14.03.2024 |
| Quarter-finals | Koolhof W./Mektic N. | Dodig I./Krajicek A. | 2:1 (6:4, 69:7, 10:7) | dettagli | 13.03.2024 |
| 1/8-finals | Seggerman R./Trhac P. | Koolhof W./Mektic N. | 0:2 (4:6, 66:7) | dettagli | 12.03.2024 |
| 1/16-finals | Johnson S./Paul T. | Koolhof W./Mektic N. | 0:2 (2:6, 63:7) | dettagli | 10.03.2024 |
United Arab Emirates: Dubai - Doubles - Main |
| 1/8-finals | Koolhof W./Mektic N. | Griekspoor T./Struff J-L. | 0:2 (3:6, 65:7) | dettagli | 27.02.2024 |
Qatar: Doha - Doubles - Main |
| Quarter-finals | Murray J./Venus M. | Koolhof W./Mektic N. | 2:0 (6:4, 7:62) | dettagli | 22.02.2024 |
| 1/8-finals | Koolhof W./Mektic N. | Mansouri S./Nawaf R. | 2:1 (3:6, 6:3, 10:8) | dettagli | 21.02.2024 |
Netherlands: Rotterdam - Doubles - Main |
| Final | Koolhof W./Mektic N. | Haase R./Van De Zandschulp B. | 2:0 (6:3, 7:5) | dettagli | 18.02.2024 |